gistfile1.cs

using System;
using System.CodeDom.Compiler;
using System.IO;
 
namespace OptimisedAdd
{
    public static class Math
    {
        // Optimised version of the + operator.
        public static void Add(int left, int right, out int result)
        {
            string doc = "using System.IO; public class Add { public void Main() { File.WriteAllText(@\"C:\\\\result.txt\",(" + left + "+" + right + ").ToString()); }} ";
            CompilerParameters cparams = new CompilerParameters();
            CompilerResults cr = CodeDomProvider.CreateProvider("c#").CompileAssemblyFromSource(cparams, doc);
            object instance = cr.CompiledAssembly.CreateInstance("Add");
            instance.GetType().GetMethod("Main").Invoke(instance, null);
            string returnedresult = File.ReadAllText(@"C:\result.txt");
            result = int.Parse(returnedresult);
        }
    }
}